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    <title>IGN WMTS</title>
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        This example uses OpenLayers v<span>4.6.5</span>. The <a id="latest-link" href="#" class="alert-link">latest</a> is v<span id="latest-version"></span>.
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          <h4 id="title">IGN WMTS</h4>
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          <p id="shortdesc">Demonstrates displaying IGN (France) WMTS layers.</p>
          <div id="docs"><p>In this example an IGN WMTS layer is displayed. For more information on IGN&#39;s WMTS service see the <a href="http://api.ign.fr/accueil">IGN Géoportail API web page</a> and <a href="http://www.geoportail.gouv.fr/depot/api/cgu/DT_APIGeoportail.pdf">Descriptif technique des web services du Géoportail</a> (french).</p>
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          <div id="api-links">Related API documentation: <ul class="inline"><li><a href="../apidoc/ol.Map.html" title="API documentation for ol.Map">ol.Map</a></li>,<li><a href="../apidoc/ol.View.html" title="API documentation for ol.View">ol.View</a></li>,<li><a href="../apidoc/ol.control.html" title="API documentation for ol.control">ol.control</a></li>,<li><a href="../apidoc/ol.extent.html" title="API documentation for ol.extent">ol.extent</a></li>,<li><a href="../apidoc/ol.layer.Tile.html" title="API documentation for ol.layer.Tile">ol.layer.Tile</a></li>,<li><a href="../apidoc/ol.proj.html" title="API documentation for ol.proj">ol.proj</a></li>,<li><a href="../apidoc/ol.source.WMTS.html" title="API documentation for ol.source.WMTS">ol.source.WMTS</a></li>,<li><a href="../apidoc/ol.tilegrid.WMTS.html" title="API documentation for ol.tilegrid.WMTS">ol.tilegrid.WMTS</a></li></ul></div>
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          <textarea class="hidden" name="title">IGN WMTS</textarea>
          <textarea class="hidden" name="description">Demonstrates displaying IGN (France) WMTS layers.</textarea>
          <textarea class="hidden" name="js">var map &#x3D; new ol.Map({
  target: &#x27;map&#x27;,
  controls: ol.control.defaults({
    attributionOptions: {
      collapsible: false
    }
  }),
  view: new ol.View({
    zoom: 5,
    center: ol.proj.transform([5, 45], &#x27;EPSG:4326&#x27;, &#x27;EPSG:3857&#x27;)
  })
});

var resolutions &#x3D; [];
var matrixIds &#x3D; [];
var proj3857 &#x3D; ol.proj.get(&#x27;EPSG:3857&#x27;);
var maxResolution &#x3D; ol.extent.getWidth(proj3857.getExtent()) / 256;

for (var i &#x3D; 0; i &lt; 18; i++) {
  matrixIds[i] &#x3D; i.toString();
  resolutions[i] &#x3D; maxResolution / Math.pow(2, i);
}

var tileGrid &#x3D; new ol.tilegrid.WMTS({
  origin: [-20037508, 20037508],
  resolutions: resolutions,
  matrixIds: matrixIds
});

// API key valid for &#x27;openlayers.org&#x27; and &#x27;localhost&#x27;.
// Expiration date is 06/29/2018.
var key &#x3D; &#x27;2mqbg0z6cx7ube8gsou10nrt&#x27;;

var ign_source &#x3D; new ol.source.WMTS({
  url: &#x27;https://wxs.ign.fr/&#x27; + key + &#x27;/wmts&#x27;,
  layer: &#x27;GEOGRAPHICALGRIDSYSTEMS.MAPS&#x27;,
  matrixSet: &#x27;PM&#x27;,
  format: &#x27;image/jpeg&#x27;,
  projection: &#x27;EPSG:3857&#x27;,
  tileGrid: tileGrid,
  style: &#x27;normal&#x27;,
  attributions: &#x27;&lt;a href&#x3D;&quot;http://www.geoportail.fr/&quot; target&#x3D;&quot;_blank&quot;&gt;&#x27; +
        &#x27;&lt;img src&#x3D;&quot;https://api.ign.fr/geoportail/api/js/latest/&#x27; +
        &#x27;theme/geoportal/img/logo_gp.gif&quot;&gt;&lt;/a&gt;&#x27;
});

var ign &#x3D; new ol.layer.Tile({
  source: ign_source
});

map.addLayer(ign);
</textarea>
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</textarea>
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        <pre><code id="example-source" class="language-markup">&lt;!DOCTYPE html&gt;
&lt;html&gt;
  &lt;head&gt;
    &lt;title&gt;IGN WMTS&lt;/title&gt;
    &lt;link rel="stylesheet" href="https://openlayers.org/en/v4.6.5/css/ol.css" type="text/css"&gt;
    &lt;!-- The line below is only needed for old environments like Internet Explorer and Android 4.x --&gt;
    &lt;script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"&gt;&lt;/script&gt;
    &lt;script src="https://openlayers.org/en/v4.6.5/build/ol.js"&gt;&lt;/script&gt;
  &lt;/head&gt;
  &lt;body&gt;
    &lt;div id&#x3D;&quot;map&quot; class&#x3D;&quot;map&quot;&gt;&lt;/div&gt;
    &lt;script&gt;
      var map &#x3D; new ol.Map({
        target: &#x27;map&#x27;,
        controls: ol.control.defaults({
          attributionOptions: {
            collapsible: false
          }
        }),
        view: new ol.View({
          zoom: 5,
          center: ol.proj.transform([5, 45], &#x27;EPSG:4326&#x27;, &#x27;EPSG:3857&#x27;)
        })
      });

      var resolutions &#x3D; [];
      var matrixIds &#x3D; [];
      var proj3857 &#x3D; ol.proj.get(&#x27;EPSG:3857&#x27;);
      var maxResolution &#x3D; ol.extent.getWidth(proj3857.getExtent()) / 256;

      for (var i &#x3D; 0; i &lt; 18; i++) {
        matrixIds[i] &#x3D; i.toString();
        resolutions[i] &#x3D; maxResolution / Math.pow(2, i);
      }

      var tileGrid &#x3D; new ol.tilegrid.WMTS({
        origin: [-20037508, 20037508],
        resolutions: resolutions,
        matrixIds: matrixIds
      });

      // API key valid for &#x27;openlayers.org&#x27; and &#x27;localhost&#x27;.
      // Expiration date is 06/29/2018.
      var key &#x3D; &#x27;2mqbg0z6cx7ube8gsou10nrt&#x27;;

      var ign_source &#x3D; new ol.source.WMTS({
        url: &#x27;https://wxs.ign.fr/&#x27; + key + &#x27;/wmts&#x27;,
        layer: &#x27;GEOGRAPHICALGRIDSYSTEMS.MAPS&#x27;,
        matrixSet: &#x27;PM&#x27;,
        format: &#x27;image/jpeg&#x27;,
        projection: &#x27;EPSG:3857&#x27;,
        tileGrid: tileGrid,
        style: &#x27;normal&#x27;,
        attributions: &#x27;&lt;a href&#x3D;&quot;http://www.geoportail.fr/&quot; target&#x3D;&quot;_blank&quot;&gt;&#x27; +
              &#x27;&lt;img src&#x3D;&quot;https://api.ign.fr/geoportail/api/js/latest/&#x27; +
              &#x27;theme/geoportal/img/logo_gp.gif&quot;&gt;&lt;/a&gt;&#x27;
      });

      var ign &#x3D; new ol.layer.Tile({
        source: ign_source
      });

      map.addLayer(ign);
    &lt;/script&gt;
  &lt;/body&gt;
&lt;/html&gt;</code></pre>
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